VONA
What is VONA?

VONA stands for Volcano Observatory Notice for Aviation. It issues reports for changes, both increases and decreases, in volcanic activities, providing a description on the nature of the unrest or eruption, potential or current hazards as well as likely outcomes. See the following link (USGS) for further details. The Center for Volcanology and Geological Hazard Mitigation (CVGHM) under the Geological Agency of the Indonesian Ministry of Energy and Mineral Resources produced VONA's reports based on analysis of data from the agency's monitoring networks as well as from direct observations. VONA's alert levels are color-coded to indicate the different types of notifications addressing specific informative needs. The reports are disseminated via email to national and international stakeholders in the aviation sector. Other interested parties can avail of them through email subscription. All notifications are publicly available online.

USGS
 

9th of July 2021, 3 weeks ago

2021-07-09 22:19:00 UTC Orange

Ibu - 20210709/2219Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 2 weeks ago

Eruption with volcanic ash cloud at 2220 UTC (0720 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Ash-cloud moving to west.

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17th of May 2021, 2 months ago

2021-05-17 01:39:00 UTC Orange

Ibu - 20210517/0139Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 2 months ago

Eruption with volcanic ash-cloud at 0139 UTC (1039 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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26th of April 2021, 3 months ago

2021-04-26 00:44:00 UTC Orange

Ibu - 20210426/0044Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash-cloud at 0016 UTC (0916 local) Best estimate of ash-cloud top is around 6160 FT (1925 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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22nd of April 2021, 3 months ago

2021-04-22 05:14:00 UTC Orange

Ibu - 20210422/0514Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash-cloud at 0358 UTC (1258 local) Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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20th of April 2021, 3 months ago

2021-04-20 09:26:00 UTC Orange

Ibu - 20210420/0926Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash-cloud at 0919 UTC (1819 local) Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east.

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6th of April 2021, 3 months ago

2021-04-06 09:39:00 UTC Orange

Ibu - 20210406/0939Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash cloud at 0912 UTC (1812 local) Best estimate of ash-cloud top is around 5520 FT (1725 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south..

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31st of March 2021, 4 months ago

2021-03-31 09:54:00 UTC Orange

Ibu - 20210331/0954Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 3 months ago

Eruption with volcanic ash-cloud at 0924 UTC (1824 local). Best estimate of ash-cloud top is around 5200 FT (1625 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east..

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25th of March 2021, 4 months ago

2021-03-25 09:11:00 UTC Orange

Ibu - 20210325/0911Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash-cloud at 0914 UTC (1814 local) Best estimate of ash-cloud top is around 7440 FT (2325 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.

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21st of March 2021, 4 months ago

2021-03-21 23:21:00 UTC Orange

Ibu - 20210321/2321Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 4 months ago

Eruption with volcanic ash-cloud at 2320 UTC (0820 local). Best estimate of ash-cloud top is around 6800 FT (2125 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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8th of February 2021, 5 months ago

2021-02-08 02:01:00 UTC Orange

Ibu - 20210208/0201Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash cloud at 0143 UTC (1043 local) Best estimate of ash-cloud top is around 22440 FT (6800 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to south..

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4th of February 2021, 5 months ago

2021-02-04 22:40:00 UTC Orange

Ibu - 20210204/2240Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 5 months ago

Eruption with volcanic ash-cloud at 2228 UTC (0728 local) Best estimate of ash-cloud top is around 22440 FT (6800 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.

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7th of January 2021, 6 months ago

2021-01-07 01:55:00 UTC Orange

Ibu - 20210107/0155Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 6 months ago

Eruption with volcanic ash-cloud at 0158 UTC (1058 local) Best estimate of ash-cloud top is around 19272 FT (5840 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to north.

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19th of December 2020, 7 months ago

2020-12-19 09:32:00 UTC Orange

Ibu - 20201219/0932Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 7 months ago

Eruption with volcanic ash-cloud at 0926 UTC (1826 local) Best estimate of ash-cloud top is around 18216 FT (5520 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. White to grey ash-cloud moving to north.

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4th of December 2020, 7 months ago

2020-12-04 06:15:00 UTC Orange

Ibu - 20201204/0615Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 7 months ago

Eruption with volcanic ash cloud at 0617 UTC (1517 local) Best estimate of ash-cloud top is around 22440 FT (6800 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to east.

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27th of November 2020, 8 months ago

2020-11-27 09:19:00 UTC Orange

Ibu - 20201127/0919Z 

Novia Antika Anggraeni, S.Si., Ibu Volcano Observatory - 8 months ago

Eruption with volcanic ash cloud at 0918 UTC (1818 local) Best estimate of ash-cloud top is around 22440 FT (6800 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer. Grey ash-cloud moving to west.

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VONA Color Code

Volcano is in normal, non-eruptive state, or, after a change from a higher level: Volcanic activity considered to have ceased, and volcano reverted to its normal, non-eruptive state.


Volcano is experiencing signs of elevated unrest above known background levels, or, after a change from higher level: Volcanic activity has decreased significantly but continues to be closely monitored for possible renewed increase.


Volcano is exhibiting heightened unrest with increased likelihood of eruption with column height below 6000 meter above sea level.


Eruption is forecast to be imminent with significant emission of ash with column height above 6000 meter above sea level.